FIX: removed continue that was exiting the loop
FIX: added try/finally to make sure locks are ALWAYS released
FIX?: sometimes the string substitution crashes, and no idea why. This
is a small protection.
Merge pull request #1376 from ubeda/dirac_admin_scripts

[v6r7]FIX: dirac-admin-allow-se not skipping loop and RSSCache bug